17alpha-amino-17beta-methyl-d-homoandrost-5-ene-3beta, 17alpha-diol derivatives and salts thereof



United States Patent 17tl-AMINO 17,3-METHYL D HOMOANDROST-S- ENE 3,8,17a DIOL DERIVATIVES AND SALTS THEREOF George W. Moersch and Duane F. Morrow, Ann Arbor, Mich., assignors to Parke, Davis & Company, Detroit, Mich., a corporation of Michigan No Drawing. Filed Oct. 7,1964, Ser. N 402,350

6 Claims. (Cl. 260-501) This application is a continuation-impart of US. application Serial Number 239,819, filed November 23, 1962, and now abandoned.

This invention relates to novel homoamino steroid compounds of the and-rostene series. More particularly, it relates to D-homoandrost--ene-3B,17a-diol compounds, which can be represented by the formula CH3 OH CH3 CH3 f to acid-addition salts thereof, and to methods for their production. In the foregoing formula R represents hydrogen or a lower alkyl radical. When R is lower alkyl, it contains fewer than 4 carbon atoms and is preferably methyl or ethyl.

In accordance with the invention, compounds of the foregoing formula can be produced by the reduction of D-homoandrost-S-ene-17a-one compounds of the formula where each R and R represents hydrogen or a lower alkanoyl radical containing fewer than 4 carbon atoms. The reduction is preferably carried out by reacting the D- homoandrost-5-ene-3p-ol-17a-one compound with lithium and hydrolyzing the reaction product by treatment with an aqueous medium. Equivalent amounts of the steroid compound and lithium aluminum hydride can be employed, but preferably the reducing agent is employed in excess. The temperature may be varied over the range from 0 C. to about 65 C.; for best results temperatures between and 50 C. and a reaction time of 2 to 15 hours are employed. Suitable solvents for the reduction reaction are the aliphatic and alicyclic ethers such as diethyl ether, dioxane, tetrahydrofuran, dimethoxyethane and the like and mixtures of these with hydrocarbon solvents such as benzene, toluene, xylene and the like. Following reaction with lithium aluminum hydride, the reaction mixture is hydrolyzed with an aqueous medium such as water, dilute aqueous inorganic acids or bases and other media containing water. While in ordinary practice an excess of the aqueous medium is added, the amount of water present should be at least four moles for each mole of lithium aluminum hydride.

, acids.

Patented August 2, 1966 ice 17a methylamino 1'7/3 methyl D homoandrost- 5-ene-3p-ol-l7a-one, having the formula CH3 CH3 H CH3 which is one of the starting materials employed in the practice of this invention can be prepared by heating 17ammethyl-D-homoandrost-5-ene-3B,17afl-diol-17-one of the formula or its epimer (at carbon atom 17a) with liquid methylamine under pressure. The D-homoandrost-5-ene-17aone compounds of the formula where each of R, and R is a lower alkanoyl radical, which are also starting materials employed in the practice of this invention, can be prepared by reacting 17amethylamino methyl D homoandrost 5 ene- 3fl-ol-17-a-one, of the aforementioned formula, with a suitable acylating agent such as a mixture of formic acid and acetic anhydride or acetic anhydride alone. The D-homoandrost-S-ene-17a-one compounds of the above formula, where R is hydrogen, which can also be used in the practice of the invention, are prepared by saponification in aqueous base of the ester group (at carbon atom 3) of the D-homoandrost-S-ene-17a-one compounds of the above formula, where R is a lower alkanoy-l radical.

The free base compounds of the invention form acidaddition salts with a variety of inorganic and organic Non-toxic salts are formed by the reaction of the free bases with such acids as hydrochloric, hydrobromic, hydriodic, sulfuric, acetic, benzoic, citric, tartaric, maleic, and related acids. The salt formation is suitably carried out by reacting the selected base with the selected acid in an unreactive solvent. The acidaddition salts can be converted to the free bases by reaction with a base such as sodium carbonate or potassium carbonate. In the applications of this invention, the compounds are preferably employed in the form of acid-addition salts.

The compounds of the invention are useful pharmacological agents. They are capable of regulating the electrolyte balance of the body fluids, being adapted .to block the effect of desoxycorticosterone acetate and aldo- .stirred at room temperature for hours.

Example 1 A mixture containing 752 mg; of 17a-methylamino- 17B methyl D homoandrost 5 ene 35 ol 173.- one and 1.0 g. of lithium aluminum hydn'de in 375 ml; of anhydrous diethyl ether and 100 ml. of benzene is After water. is carefully added to decompose the reaction mixture, the mixture is diluted with benzene and 250 ml. of a saturated aqueous sodium potassium tartrate solution is added. The separated organic phase is isolated, dried over anhydrous magnesium sulfate, and concentrated to dryness under reduced pressure. The 17u-methylaminol7,3-methyl-D-homoandrost-Sene-3B,l7a-diol obtained is triturated with ether, isolated by filtration, and dried in vacuo.

The hydrochloride salt of 17a methyl-amino 1718 methyl-D-homoandrost-5-ene-3/S,l7adiol is prepared by dissolving the free base in methanol and treating the resulting solution with an excess of dry hydrogen chloride. The product obtained. after removal of the solvent'by distillation under reduced pressure is purified. by recrystallization from isopropyl alcohol; M.P. 300 C..

The 17a methylamino 17,3 methyl D 1101110311. drost-5-ene-3,8-ol-17a-one used. as starting material is prepared as follows:

A mixture containing 7.84 g. of l7aot-methy-l-D-. homoandrost 5 ene 313,17a5 diol 17 one (the epimeric 17afi-methyl-D-hom-oandrost-S-ene-313,l7aadioll7-one may also be used) and 80 g. of liquid methylamine is heated under pressure in a pressure vessel at 194-198 C. for ten hours. The reaction mixture is allowed to cool, the excess methylamine is vented, and the residue is dissolved in methanol. The methanolic solution is filtered and the filtrate is concentrated to dryness under reduced pressure. The residue is dissolved in 80 ml. of isopropyl alcohol, 10 ml. of 12 N'hydro- They t chloric acidis added, and the mixture is heated on the steam bath for two hours. Upon filtration of the cooled mixture, there is obtained the hydrochloride salt of 17a methylamino 17 3 methyl D homoandrost- 5-ene-3fl-ol-l7a-one. The salt can be recrystallized from a methanol-ethyl acetate solvent mixture; M.P. 310 C.; [cab -225 (1% in methanol).

I The free base, 17 a-me-thylamino-17 B-methyl-D-homoandrost-5-ene-3fi-ol-17a-one, can be prepared by treating the hydrochloride salt with an equivalent amount of.

sodium carbonate in aqueous solution. The free base can be recrystallized from methanol; M.P. 205-207 C'.; [(11 l7.4 (1% in methanol).

methyl D homoandrost 5 ene l7aone 17a yl)- N-methylformamide and 3.5 g. of lithium aluminum.

hydride in 300 ml. of dry tetrahydrofur'an and 200 ml.

of dry diethyl ether is stirred at roomtemperature over:

night. Water is added to hydrolyze the reaction mixture, and 250 ml. of a saturated aqueous sodium potassium tartrate solution is added. The separated organic phase is isolated, the aqueous phase is extracted with ether, and the ether extracts are combined with? the. organic phase. After drying over anhydrous magnesium sulfate, the organic phase is concentrated to near dry-;

ness, and the residue is isolated by filtration to give 170:-

dimethylamino 17/3 methyl D homoandrost 5 ene-.-

3/8,17a-di'ol, which can be recrystallized from ethanol; M.P. 235:-235.5 C.

Thehydrochloride salt is prepared by dissolving the,

4 1 The L(+)-tartrate salt is solution of d-tartaric acid in ether.

obtained is isolated by filtration and. dried in'pvacuo; M.P.'2l4216 C.

In asimilar manner the citrate salt is prepared from the free base andcitric acid; M.P. 219222? C.

The N-(Sfl-hydroxy 17B- methyl; D homoandrost- 5-ene-17oz-one-l7a-yl)-N metl1ylformamide usedas starting material can be prepared as follows:

A solution of 5.0 g..of l7a-methyl amino-l75-methyl-D- homoandrost-5-ene-3B-ol-17a-one in a mixture of 50 ml.

of 98% formic acid and 321ml. of acetic anhydride is Thezsolution is allowed to cool,.is poured into water, and the precipitate heated under reflux. for :7 hours.

obtained is isolated by filtration. The solid is dissolved in-methylene chloride, the .solution is: dried over anhy-. dr-ous magnesiumsulfate and the dried solution isconcentrated to near dryness. After isolation by filtration, the crude. N-(3B-formyl-l7fi-methyl D.- homoandrost 5- ene l7a-one-l7a-yl)-N-methylformamide is dissolved in 900 ml. of methanol, a solution of 4.2 g. of sodium hydroxide in 510 ml. of water is added, ,and. the mixture is allowed to stand at room temperature for one hour. After neutralization with; acetic acid, the .mixture. is concen-:

trated. underreduced pressure,,poured-.into water, and the solid obtained is isolated by filtration .and dried. The

N (35 hydroxy 17,8 methyl D homoandrost 5-' ene-17 a one-17a yl)-N-methylformamide can be recrystallized from methanol;- M'.P. 210 212"v C.

Example 3 A solution of 500 mg. of N (3s hydroxyl7B-methyl- D homoandrost 5 ene- 17a one 17a yl) N- methylacetamidei in '75 ml. of dry'tetrahydrofuran and 50 ml. of dry diethyl ether is added .to a suspension-of 500 mg. of lithiurnaluminumhydride in 50 ml; of dry' diethyl ether, and the mixture is stirred at room tempera-. ture overnight. A saturated aqueous. sodium potassium;

tartrate solution (50.n1l.) is: added, the resulting mixture .is stirred for one! hour, and the separated. organic and aqueous phases are isolated. The aqueousphase is extracted with diethyl ether, the extracts are combined.

with the organic phase, and they organici solution .isdried over-anhydrous. magnesium sulfate. The. dried solution. is evaporated to dryness to give methylethylamino- 17B methyl D homoandrost 5 ene r 35,1721 diol;

M.P. l37150 C.

The hydrochloride :salt' is prepared by dissolving the free base in ether and treating the: resulting solution with The I product oban excess of dry hydrogen chloride; tained is isolatedby filtration and can be recrystallized from isopropylalcohol; M.P; 254-256" C.

The N (3,3 hydroxy 17,8 methyl D-homoandrosn 5-ene-17a-one-l7a yl)-N-methylacetamide.used :as start-' ing material can'be prepared by treating 17a-methylamino 17B methyl- D homoandrost 5 ene. 35-

ol-l7;a-one with acetic anhydride; at. room; temperaturefori88 hours, and thenzsaponifying the resulting N-'(3flacetoxy 17,8 methyl D homoandrost 5 ene 17a one-l7a-yl)-N-methylacetamide with aqueous sodium -hydroxide in methanol to give the desired product; M.P.

prepared by dissolving the. free base in ether and adding the ethereal solution to a r Theprecipitate 5 6 and acid-addition salts thereof, where R is chosen from 6. 170a methylethylamino 175 methyl-D-homothe class consisting of hydrogen and lower alkyl radicals androst-5-ene-3B,17a-diol hydrochloride. containing fewer than 4 carbon atoms. References Cited by the Examiner 2. 17a methylamino 17f? methyl D homoandrost- 5-ene-3p,17a-diol hydrochloride. 5 Cremlyn et al.: Journal Chemical Soc. London, 1953,

3. 17a dimethylamino 17B methyl D homopages 184742. androst-5-ene-3fi,17a-diol hydrochloride. Morrow et al.: Chemistry & Industry, No. 37, Sept.

4. 17a-dimethylamino 17B methyl D-homoandrost- 1962- 5-ene-3 8,17 a-diol L(+ -tartrate.

5. 17a dimethylamino 17}? methyl-D-homoandrost- 10 CHARLES PARKER Pr'mary Exammer' 5-ene-3,B,17a-diol citrate. ROBERT V. HINES, Assistant Examiner. 

1. A MEMBER OF THE CLASS CONSISTING OF D-HOMOANDROST5-ENE-3B,17A-DIOL COMPOUNDS, HAVING THE FORMULA 